... Valve margin汽门头厚度 Valve operating clearence汽门脚间隙 Valve overlap汽门重迭 ...
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... 汽门头Valve lifter 汽门头厚度Valve operating clearence 汽门脚间隙Valve overlap ...
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... 砌厚度 thickness of lining 汽厚度 valve operating clearence 厚度2毫米以下 thin boards ...
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